Open Shortest Path First (OSPF)—A link-state IGP that makes routing decisions based on the
shortest-path-first (SPF) algorithm (also referred to as the Dijkstra algorithm).
OSPFv3—The
IPv6-enabled version of the OSPF protocol.
link-state advertisement (LSA)—A multi-tiered message format for OSPFv2 and OSPFv3 that carries
information about the OSPF network to OSPF-enabled routers. The collection
of LSAs forms the link-state database used by the routers to select
optimum paths. Different LSA levels limit the scope of OSPF protocol
message delivery to links, areas, or autonomous systems (ASs).
